I cant install it on Kubuntu 15.10, I try to compile the QT5 branch and get this error "Tell CMake where to find the compiler by setting either the environment variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path to the compiler, or to the compiler name if it is in the PATH.", I install all dependences, but the "taglib" is called libtag in the Kubuntu's repos and cant install the .deb package

Thanks for the hint, I'll put mpv compatibility on my todo list.
Where did you install the .deb from? I never tested soundkonverter with mplayer2 but since it can be used as drop-in replacement for mplayer (as far as I know) it seems the packager just pulled mplayer2 in.

I installed it from the Debian testing repo directly. Debian doesn't package mplayer at all and packages mplayer2 instead. mplayer2 however is now a dead project and actually mpv is more advanced and actively developed than either of mplayers.

new in 2.2.0:
-Add: Decode webm audio stream
-Add: --file-list argument
-Change: Remove both APE and ID3 Replay Gain tags with mp3gain and aacgain
-Change: Disable "modify audio stream" option by default in mp3gain and aacgain
-Change: Don't write icedax info file
-Change: Set so-version for libsoundkonvertercore
-Fix: Don't require an output path when using a user defined profile as command line argument
-Fix: Don't crash when tags can't be read
-Fix: Error message when trying to write to a directory without permissions
-Fix: Store album artist information to file list files
-Fix: Some crashes
-Fix: Handle newer ffmpeg versions
-Fix: Don't wait with Replay Gain calculation for items with same album name but no Replay Gain conversion option set
-Fix: Don't convert all files at once if the conversion starts with copying files with the same input an output codec
-Fix: Infinite loop when waiting for album gain for a failed item

new 2.1.90 (2.2.0 rc1):
-Add: Detect (DRM)-encrypted wma and m4a files
-Add: Adjust gain for mp3 files
-Add: Option to copy files instead of re-encoding them if input and output codec are the same
-Change: Fall-back from album artist to artist in "meta data" naming mode if album artist is empty